Automations · Written review
Ask My Books: RAG With Retune's API Inside Typebot
TL;DR — the 20-second version
The channel's most-viewed video: upload two books into Retune, call its API from Typebot, and ask questions across both — retrieval-augmented answers with zero custom code.
At 2,600+ views, this is the most-watched video on the channel — and I think it’s because it answers the question everyone actually has: “Can I make a bot that knows my documents?” The answer is yes, in an afternoon, with no custom backend.
The build
Two moving parts:
- Retune gets the brains. Upload the two books as data sources and it builds a searchable knowledge base — this is retrieval-augmented generation (RAG) without you writing any of the retrieval code.
- Typebot gets the face. An API call block hits Retune’s endpoint, and the user’s question comes back as an answer grounded in the books.
That’s the whole architecture. The video shows the API call being configured end to end — endpoint, payload, and mapping the response back into the chat.
What impressed me building it
How little glue there is. The naive version of this project is a web server, an embedding pipeline, a vector store, and a week of your life. Here, “which chunks of the books are relevant?” is somebody else’s API call. The video is deliberately boring because the hard parts got absorbed into the product.
The honest limitations
- Context windows are not infinite. Two books is fine; two hundred is a different conversation about chunking strategy and cost.
- Every question is an API call — there’s a per-message cost, and latency depends on the provider. Fine for a personal bot, worth modeling for anything user-facing.
- Garbage in, confident garbage out. If the upload is a scanned PDF with bad OCR, the bot will answer fluently and wrongly. Test with questions you know the true answer to.
Start here
If you only watch one video on this channel, make it this one — it’s the on-ramp to everything else: once the API call works, the Stripe pay-to-chat pattern and inline variable formatting from the other reviews snap straight on top of it.